Experimental Visibility Rating, HRRR smoke forecast for 29-06-2022 07PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1000ft
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
6000ft
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Experimental Surface Smoke, HRRR smoke forecast for 29-06-2022 07PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Last 6-hourly Visibility forecast for 29-06-2022 5PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1000ft
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
6000ft
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Last 6-hourly Smoke forecast for 29-06-2022 5PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48



HRRR visibility product description:
This product is derived from NOAA/NWS HRRR smoke hourly Rapid Refresh updates to support current California wildfire operations. Visibility is calculated by DRI-CEFA-CANSAC based on Malm and Schichtel (2013). Forecasted concentrations of PM2.5 are converted to visibility (in miles AGL) using the algorithm Visual Range (VR) = 870/PM2.5.
Reference: Malm, W.C. and B.A. Schichtel, 2013: Uncertainty associated with estimating a short-term (1-3 hr) particulate matter concentration from a human-sighted visual range. Final report to the Joint Fire Science Program (13-C-01-01).